Thermally stable lithium salts for polymer electrolytes

✍ Scribed by Larry A. Dominey; Victor R. Koch; Tom J. Blakley

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 273 KB
• Volume: 37
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(92)80109-y

✦ Synopsis

Chemical and electrochemical characterization of two new Li salts which exhibit high conductivity in both liquid and polymer solvent systems are presented. When dissolved in non-aqueous solvents such as tetrahydrofuran LiN(SO,CF,),, Li bis-(trifluoromethanesulfonyl)imide and LiC(SO,CF,),, Li tris-(trifluoromethanesulfonyl)methide are the two most highly conductive organic anion-based Li salts known. Cyclic voltammetry studies show both salts to be electrochemically stable beyond 4 V us Li. They are also stable indefinitely at elevated temperatures, eg lOO"C, unlike the large class of inorganic Li salts based on perhalogenated transition metal and main group ions.